function GuiTableRowProducePurchase() {
};

GuiTableRowProducePurchase.instance = function(prefix) {
  return { name: document.getElementById(prefix + '_name_td'),
           designer: document.getElementById(prefix + '_designer_td'),
           task: document.getElementById(prefix + '_task_td'),
           dateline: document.getElementById(prefix + '_date_td'),
           progress: document.getElementById(prefix + '_progress_td')
         };
};